function param = param_trans( theta, param)
       
    theta       = abs(theta);    
    param.s     = theta(1)./(1+theta(1));
    param.sigma = theta(2)./(1+theta(2)).*0.5;
    param.mu    = -1./2.*param.sigma.^2.*param.alpha./(1-param.alpha);
    param.c     = theta(3);
    param.beta   = theta(4)./(1+theta(4));
    param.omega_1 = 1-(1-param.beta)./(1-param.beta.*(1-param.alpha));
    param.omega_0 = 1-param.beta;% Normalization in paper

    if param.inac_mom == 0
        param.K = 0;
    else
        param.K = theta(5);
    end

end